Added descriptions of functions: udm_get_doc_count, udm_api_version,

Crosswords support, cosmetic changes


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@42492 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Dmitry Tkatchenko 2001-03-02 10:02:46 +00:00
parent 0056790e76
commit 75afe08593

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@ -1,4 +1,4 @@
<reference id="ref.mnogo">
<reference id="ref.mnogo">
<title>mnoGoSearch Functions</title>
<titleabbrev>mnoGoSearch</titleabbrev>
<partintro>
@ -46,239 +46,7 @@
</simpara>
</partintro>
<refentry id="function.udm-alloc-agent">
<refnamediv>
<refname>udm_alloc_agent</refname>
<refpurpose>Allocate mnoGoSearch session</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>udm_alloc_agent</function></funcdef>
<paramdef>string <parameter>dbaddr</parameter></paramdef>
<paramdef>string
<parameter>
<optional>dbmode</optional>
</parameter>
</paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_alloc_agent</function> returns mnogosearch agent
identifier on success, <literal>FALSE</literal> on error. This function creates a
session with database parameters.
</para>
<para>
<parameter>dbaddr</parameter> - URL-style database description. Options (type, host, database name, port, user and password) to connect to SQL database.
Do not matter for built-in text files support. Format: DBAddr DBType:[//[DBUser[:DBPass]@]DBHost[:DBPort]]/DBName/
Currently supported DBType values are: mysql, pgsql, msql, solid, mssql, oracle, ibase. Actually, it does not matter for native libraries support.
But ODBC users should specify one of supported values. If your database type is not supported, you may use "unknown" instead.
</para>
<para>
<parameter>dbmode</parameter> - You may select SQL database mode of words storage. When "single" is specified, all words are stored in the same
table. If "multi" is selected, words will be located in different tables depending of their lengths. "multi" mode is usually faster
but requires more tables in database. If "crc" mode is selected, mnoGoSearch will store 32 bit integer
word IDs calculated by CRC32 algorythm instead of words. This mode requres less disk space and it is faster comparing with "single"
and "multi" modes. "crc-multi" uses the same storage structure with the "crc" mode, but also stores words in different tables depending on
words lengths like "multi" mode. Format: DBMode single/multi/crc/crc-multi
</para>
<note>
<para>
<parameter>dbaddr</parameter> and <parameter>dbmode</parameter> must match those used during indexing.
</para>
</note>
<note>
<para>
In fact this function does not open connection to database and
thus does not check entered login and password. Actual connection to database and login/password verification is done by <function>udm_find</function>.
</para>
</note>
</refsect1>
</refentry>
<refentry id="function.udm-set-agent-param">
<refnamediv>
<refname>udm_set_agent_param</refname>
<refpurpose>Set mnoGoSearch agent session parameters</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>udm_set_agent_param</function></funcdef>
<paramdef>int <parameter>agent</parameter></paramdef>
<paramdef>int <parameter>var</parameter></paramdef>
<paramdef>string <parameter>val</parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_set_agent_param</function> returns <literal>TRUE</literal> on success,
<literal>FALSE</literal> on error. Defines mnoGoSearch session parameters.
</para>
<simpara>
The following parameters and their values are available:
</simpara>
<itemizedlist>
<listitem>
<simpara>
UDM_PARAM_PAGE_NUM - used to choose search results page number (results are returned by pages beginning from
0, with UDM_PARAM_PAGE_SIZE results per page).
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_PAGE_SIZE - number of search results displayed on one page.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_SEARCH_MODE - search mode. The following values available: UDM_MODE_ALL -
search for all words; UDM_MODE_ANY - search for any word; UDM_MODE_PHRASE - phrase search; UDM_MODE_BOOL - boolean search. See <function>udm_find</function> for details on boolean search.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_CACHE_MODE - turns on or off search result cache mode. When enabled, the search engine will store
search results to disk. In case a similar search is performed later, the engine will take results from the cache for faster performance.
Available values: UDM_CACHE_ENABLED, UDM_CACHE_DISABLED.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_TRACK_MODE - turns on or off trackquery mode. Since version 3.1.2 mnoGoSearch has a query tracking support.
Note that tracking is implemented in SQL version only and not available in built-in database.
To use tracking, you have to create tables for tracking support. For MySQL, use create/mysql/track.txt.
When doing a search, front-end uses those tables to store query words, a number of found documents and current UNIX timestamp in seconds.
Available values: UDM_TRACK_ENABLED, UDM_TRACK_DISABLED.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_PHRASE_MODE - defines whether index database using phrases ("phrase" parameter in indexer.conf).
Possible values: UDM_PHRASE_ENABLED and UDM_PHRASE_DISABLED.
Please note, that if phrase search is enabled (UDM_PHRASE_ENABLED),
it is still possible to do search in any mode (ANY, ALL, BOOL or PHRASE).
In 3.1.10 version of mnoGoSearch phrase search is supported only in sql and buuilt-in database modes,
while beginning with 3.1.11 phrases are supported in cachemode as well.
</simpara>
<simpara>
Examples of phrase search:
</simpara>
<simpara>
"Arizona desert" - This query returns all indexed documents that contain "Arizona desert" as a phrase. Notice that you need to put double quotes around the phrase
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_CHARSET - defines local charset. Available values: set of charsets supported by mnoGoSearch,
e.g. koi8-r, cp1251, ...
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_STOPFILE - Defines name and path
to stopwords file. (There is a small difference with mnoGoSearch
- while in mnoGoSearch if relative path or no path entered, it
looks for this file in relation to UDM_CONF_DIR, the module looks for
the file in relation to current path, i.e. to the path where the
php script is executed.)
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_STOPTABLE - Load stop words from the given SQL table. You may use several StopwordTable commands.
This command has no effect when compiled without SQL database support.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_WEIGHT_FACTOR - represents weight factors for specific document parts. Currently body, title, keywords, description, url are supported.
To activate this feature please use degrees of 2 in *Weight commands of
the indexer.conf. Let's imagine that we have these weights:
</simpara>
<simpara>URLWeight 1</simpara>
<simpara>BodyWeight 2</simpara>
<simpara>TitleWeight 4</simpara>
<simpara>KeywordWeight 8</simpara>
<simpara>DescWeight 16</simpara>
<simpara>
As far as indexer uses bit OR operation for word weights when some
word presents several time in the same document, it is possible at search
time to detect word appearance in different document parts. Word which
appears only in the body will have 00000010 argegate weight (in binary notation).
Word used in all document parts will have 00011111 aggregate weight.
</simpara>
<simpara>
This parameter's value is a string of hex digits ABCDE. Each digit is a factor for corresponding bit in word weight. For the given above weights
configuration:
</simpara>
<simpara>E is a factor for weight 1 (URL Weight bit)</simpara>
<simpara>D is a factor for weight 2 (BodyWeight bit)</simpara>
<simpara>C is a factor for weight 4 (TitleWeight bit)</simpara>
<simpara>B is a factor for weight 8 (KeywordWeight bit)</simpara>
<simpara>A is a factor for weight 16 (DescWeight bit)</simpara>
<simpara>
Examples:
</simpara>
<simpara>
UDM_PARAM_WEIGHT_FACTOR=00001 will search through URLs only.
</simpara>
<simpara>
UDM_PARAM_WEIGHT_FACTOR=00100 will search through Titles only.
</simpara>
<simpara>
UDM_PARAM_WEIGHT_FACTOR=11100 will search through Title,Keywords,Desctription but not through URL and Body.
</simpara>
<simpara>
UDM_PARAM_WEIGHT_FACTOR=F9421 will search through:
</simpara>
<simpara>Description with factor 15 (F hex)</simpara>
<simpara>Keywords with factor 9</simpara>
<simpara>Title with factor 4</simpara>
<simpara>Body with factor 2</simpara>
<simpara>URL with factor 1</simpara>
<simpara>
If UDM_PARAM_WEIGHT_FACTOR variable is ommited, original weight value is
taken to sort results. For a given above weight configuration it means
that document description has a most big weight 16.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_WORD_MATCH - word match. You may use this parameter to choose word match type. This feature works only
in "single" and "multi" modes using SQL based and built-in database. It does not work in cachemode and other modes
since they use word CRC and do not support substring search.
Available values:
</simpara>
<simpara>UDM_MATCH_BEGIN - word beginning match;</simpara>
<simpara>UDM_MATCH_END - word ending match;</simpara>
<simpara>UDM_MATCH_WORD - whole word match;</simpara>
<simpara>UDM_MATCH_SUBSTR - word substring match.</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_MIN_WORD_LEN - defines minimal word length.
Any word shorter this limit is considered to be a stopword. Please note that this paraneter value is inclusive,
i.e. if UDM_PARAM_MIN_WORD_LEN=3, a word 3 characters long will not be considered a stopword, while
a word 2 characters long will be. Default value is 1.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_ISPELL_PREFIXES - Possible values: UDM_PREFIXES_ENABLED and UDM_PREFIXES_DISABLED,
that respectively enable or disable using prefixes. E.g. if a word "tested" is in search query, also words like "test", "testing", etc.
Only suffixes are supported by default. Prefixes usually change word meanings, for example if somebody is searching for the word "tested"
one hardly wants "untested" to be found. Prefixes support may also be found useful for site's
spelling checking purposes. In order to enable ispell, you have to load ispell data with <function>udm_load_ispell_data</function>.
</simpara>
</listitem>
</itemizedlist>
</refsect1>
</refentry>
<refentry id="function.udm-add-search-limit">
<refentry id="function.udm-add-search-limit">
<refnamediv>
<refname>udm_add_search_limit</refname>
<refpurpose>Add various search limits</refpurpose>
@ -364,8 +132,92 @@
</itemizedlist>
</refsect1>
</refentry>
<refentry id="function.udm-clear-search-limits">
<refentry id="function.udm-alloc-agent">
<refnamediv>
<refname>udm_alloc_agent</refname>
<refpurpose>Allocate mnoGoSearch session</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>udm_alloc_agent</function></funcdef>
<paramdef>string <parameter>dbaddr</parameter></paramdef>
<paramdef>string
<parameter>
<optional>dbmode</optional>
</parameter>
</paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_alloc_agent</function> returns mnogosearch agent
identifier on success, <literal>FALSE</literal> on error. This function creates a
session with database parameters.
</para>
<para>
<parameter>dbaddr</parameter> - URL-style database description. Options (type, host, database name, port, user and password) to connect to SQL database.
Do not matter for built-in text files support. Format: DBAddr DBType:[//[DBUser[:DBPass]@]DBHost[:DBPort]]/DBName/
Currently supported DBType values are: mysql, pgsql, msql, solid, mssql, oracle, ibase. Actually, it does not matter for native libraries support.
But ODBC users should specify one of supported values. If your database type is not supported, you may use "unknown" instead.
</para>
<para>
<parameter>dbmode</parameter> - You may select SQL database mode of words storage. When "single" is specified, all words are stored in the same
table. If "multi" is selected, words will be located in different tables depending of their lengths. "multi" mode is usually faster
but requires more tables in database. If "crc" mode is selected, mnoGoSearch will store 32 bit integer
word IDs calculated by CRC32 algorythm instead of words. This mode requres less disk space and it is faster comparing with "single"
and "multi" modes. "crc-multi" uses the same storage structure with the "crc" mode, but also stores words in different tables depending on
words lengths like "multi" mode. Format: DBMode single/multi/crc/crc-multi
</para>
<note>
<para>
<parameter>dbaddr</parameter> and <parameter>dbmode</parameter> must match those used during indexing.
</para>
</note>
<note>
<para>
In fact this function does not open connection to database and
thus does not check entered login and password. Actual connection to database and login/password verification is done by <function>udm_find</function>.
</para>
</note>
</refsect1>
</refentry>
<refentry id="function.udm-api-version">
<refnamediv>
<refname>udm_api_version</refname>
<refpurpose>Get mnoGoSearch API version.</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>udm_api_version</function></funcdef>
<paramdef><parameter></parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_api_version</function> returns mnoGoSearch API version number. E.g. if
mnoGoSearch 3.1.10 API is used, this function will return <literal>30110</literal>.
</para>
<para>
This function allows user to identify which API functions are available, e.g.
<function>udm_get_doc_count</function> function is only available in mnoGoSearch 3.1.11 or later.
</para>
<simpara>Example:</simpara>
<informalexample>
<programlisting role="C">
if (Udm_Api_Version() &gt;= 30111) {
print "Total number of urls in database: ".Udm_Get_Doc_Count($udm)."&lt;br&gt;\n";
}
</programlisting>
</informalexample>
</refsect1>
</refentry>
<refentry id="function.udm-clear-search-limits">
<refnamediv>
<refname>udm_clear_search_limits</refname>
<refpurpose>Clear all mnoGoSearch search restrictions</refpurpose>
@ -384,6 +236,60 @@
</refsect1>
</refentry>
<refentry id="function.udm-errno">
<refnamediv>
<refname>udm_errno</refname>
<refpurpose>Get mnoGoSearch error number</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>udm_errno</function></funcdef>
<paramdef>int <parameter>agent</parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_errno</function> returns mnoGoSearch error number,
zero if no error.
</para>
<para>
<parameter>agent</parameter> - link to agent identifier, received
after call to <function>udm_alloc_agent</function>.
</para>
<para>
Receiving numeric agent error code.
</para>
</refsect1>
</refentry>
<refentry id="function.udm-error">
<refnamediv>
<refname>udm_error</refname>
<refpurpose>Get mnoGoSearch error message</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>string <function>udm_error</function></funcdef>
<paramdef>int <parameter>agent</parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_error</function> returns mnoGoSearch error message,
empty string if no error.
</para>
<para>
<parameter>agent</parameter> - link to agent identifier, received
after call to <function>udm_alloc_agent</function>.
</para>
<para>
Receiving agent error message.
</para>
</refsect1>
</refentry>
<refentry id="function.udm-find">
<refnamediv>
<refname>udm_find</refname>
@ -446,68 +352,113 @@
</refsect1>
</refentry>
<refentry id="function.udm-get-res-param">
<refentry id="function.udm-free-agent">
<refnamediv>
<refname>udm_get_res_param</refname>
<refpurpose>Get mnoGoSearch result parameters</refpurpose>
<refname>udm_free_agent</refname>
<refpurpose>Free mnoGoSearch session</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>string <function>udm_get_res_param</function></funcdef>
<paramdef>int <parameter>res</parameter></paramdef>
<paramdef>int <parameter>param</parameter></paramdef>
<funcdef>int <function>udm_free_agent</function></funcdef>
<paramdef>int <parameter>agent</parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_get_res_param</function> returns result parameter
value on success, <literal>FALSE</literal> on error.
<function>udm_free_agent</function> returns <literal>TRUE</literal> on success, <literal>FALSE</literal> on error.
</para>
<para>
<parameter>agent</parameter> - link to agent identifier, received
after call to <function>udm_alloc_agent</function>.
</para>
<para>
Freeing up memory allocated for agent session.
</para>
</refsect1>
</refentry>
<refentry id="function.udm-free-ispell-data">
<refnamediv>
<refname>udm_free_ispell_data</refname>
<refpurpose>Free memory allocated for ispell data</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>udm_free_ispell_data</function></funcdef>
<paramdef>int <parameter>agent</parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_free_ispell_data</function> always returns <literal>TRUE</literal>.
</para>
<para>
<parameter>agent</parameter> - agent link identifier, received after call to <function>udm_alloc_agent</function>.
</para>
<note>
<para>
In mnoGoSearch 3.1.10 this function is not yet implemented, it is added for compatibility with future versions and does not perform anything yet.
</para>
</note>
</refsect1>
</refentry>
<refentry id="function.udm-free-res">
<refnamediv>
<refname>udm_free_res</refname>
<refpurpose>Free mnoGoSearch result</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>udm_free_res</function></funcdef>
<paramdef>int <parameter>res</parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_free_res</function> returns <literal>TRUE</literal> on success, <literal>FALSE</literal> on error.
</para>
<para>
<parameter>res</parameter> - a link to result identifier,
received after call to <function>udm_find</function>.
</para>
<para>
<parameter>param</parameter> - parameter identifier, may have the
following values:
Freeing up memory allocated for results.
</para>
<itemizedlist>
<listitem>
<simpara>
UDM_PARAM_NUM_ROWS - number of received found links on the current page. It is equal to
UDM_PARAM_PAGE_SIZE for all search pages, on the last page - the rest of links.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_FOUND - total number of results matching the query.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_WORDINFO - information on the words found. E.g. search for "a good book" will return "a: stopword, good:5637, book: 120"
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_SEARCHTIME - search time in seconds.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_FIRST_DOC - the number of the first document displayed on current page.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_LAST_DOC - the number of the last document displayed on current page.
</simpara>
</listitem>
</itemizedlist>
</refsect1>
</refentry>
<refentry id="function.udm-get-doc-count">
<refnamediv>
<refname>udm_get_doc_count</refname>
<refpurpose>Get total number of documents in database.</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>udm_get_doc_count</function></funcdef>
<paramdef>int <parameter>agent</parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_get_doc_count</function> returns nuimber of documents in database.
</para>
<para>
<parameter>agent</parameter> - link to agent identifier, received
after call to <function>udm_alloc_agent</function>.
</para>
<note>
<simpara>
This function is supported only in mnoGoSearch 3.1.11 or later.
</simpara>
</note>
</refsect1>
</refentry>
<refentry id="function.udm-get-res-field">
<refnamediv>
<refname>udm_get_res_field</refname>
@ -601,8 +552,71 @@
</listitem>
</itemizedlist>
</refsect1>
</refentry>
<refentry id="function.udm-get-res-param">
<refnamediv>
<refname>udm_get_res_param</refname>
<refpurpose>Get mnoGoSearch result parameters</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>string <function>udm_get_res_param</function></funcdef>
<paramdef>int <parameter>res</parameter></paramdef>
<paramdef>int <parameter>param</parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_get_res_param</function> returns result parameter
value on success, <literal>FALSE</literal> on error.
</para>
<para>
<parameter>res</parameter> - a link to result identifier,
received after call to <function>udm_find</function>.
</para>
<para>
<parameter>param</parameter> - parameter identifier, may have the
following values:
</para>
<itemizedlist>
<listitem>
<simpara>
UDM_PARAM_NUM_ROWS - number of received found links on the current page. It is equal to
UDM_PARAM_PAGE_SIZE for all search pages, on the last page - the rest of links.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_FOUND - total number of results matching the query.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_WORDINFO - information on the words found. E.g. search for "a good book" will return "a: stopword, good:5637, book: 120"
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_SEARCHTIME - search time in seconds.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_FIRST_DOC - the number of the first document displayed on current page.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_LAST_DOC - the number of the last document displayed on current page.
</simpara>
</listitem>
</itemizedlist>
</refsect1>
</refentry>
<refentry id="function.udm-load-ispell-data">
<refnamediv>
<refname>udm_load_ispell_data</refname>
@ -715,140 +729,204 @@
</itemizedlist>
</refsect1>
</refentry>
<refentry id="function.udm-free-ispell-data">
<refnamediv>
<refname>udm_free_ispell_data</refname>
<refpurpose>Free memory allocated for ispell data</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>udm_free_ispell_data</function></funcdef>
<paramdef>int <parameter>agent</parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_free_ispell_data</function> always returns <literal>TRUE</literal>.
</para>
<para>
<parameter>agent</parameter> - agent link identifier, received after call to <function>udm_alloc_agent</function>.
</para>
<note>
<para>
In mnoGoSearch 3.1.10 this function is not yet implemented, it is added for compatibility with future versions and does not perform anything yet.
</para>
</note>
</refsect1>
</refentry>
<refentry id="function.udm-free-res">
<refnamediv>
<refname>udm_free_res</refname>
<refpurpose>Free mnoGoSearch result</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>udm_free_res</function></funcdef>
<paramdef>int <parameter>res</parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_free_res</function> returns <literal>TRUE</literal> on success, <literal>FALSE</literal> on error.
</para>
<para>
<parameter>res</parameter> - a link to result identifier,
received after call to <function>udm_find</function>.
</para>
<para>
Freeing up memory allocated for results.
</para>
</refsect1>
</refentry>
<refentry id="function.udm-free-agent">
<refentry id="function.udm-set-agent-param">
<refnamediv>
<refname>udm_free_agent</refname>
<refpurpose>Free mnoGoSearch session</refpurpose>
<refname>udm_set_agent_param</refname>
<refpurpose>Set mnoGoSearch agent session parameters</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>udm_free_agent</function></funcdef>
<funcdef>int <function>udm_set_agent_param</function></funcdef>
<paramdef>int <parameter>agent</parameter></paramdef>
<paramdef>int <parameter>var</parameter></paramdef>
<paramdef>string <parameter>val</parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_free_agent</function> returns <literal>TRUE</literal> on success, <literal>FALSE</literal> on error.
<function>udm_set_agent_param</function> returns <literal>TRUE</literal> on success,
<literal>FALSE</literal> on error. Defines mnoGoSearch session parameters.
</para>
<para>
<parameter>agent</parameter> - link to agent identifier, received
after call to <function>udm_alloc_agent</function>.
</para>
<para>
Freeing up memory allocated for agent session.
</para>
</refsect1>
<simpara>
The following parameters and their values are available:
</simpara>
<itemizedlist>
<listitem>
<simpara>
UDM_PARAM_PAGE_NUM - used to choose search results page number (results are returned by pages beginning from
0, with UDM_PARAM_PAGE_SIZE results per page).
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_PAGE_SIZE - number of search results displayed on one page.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_SEARCH_MODE - search mode. The following values available: UDM_MODE_ALL -
search for all words; UDM_MODE_ANY - search for any word; UDM_MODE_PHRASE - phrase search; UDM_MODE_BOOL - boolean search. See <function>udm_find</function> for details on boolean search.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_CACHE_MODE - turns on or off search result cache mode. When enabled, the search engine will store
search results to disk. In case a similar search is performed later, the engine will take results from the cache for faster performance.
Available values: UDM_CACHE_ENABLED, UDM_CACHE_DISABLED.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_TRACK_MODE - turns on or off trackquery mode. Since version 3.1.2 mnoGoSearch has a query tracking support.
Note that tracking is implemented in SQL version only and not available in built-in database.
To use tracking, you have to create tables for tracking support. For MySQL, use create/mysql/track.txt.
When doing a search, front-end uses those tables to store query words, a number of found documents and current UNIX timestamp in seconds.
Available values: UDM_TRACK_ENABLED, UDM_TRACK_DISABLED.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_PHRASE_MODE - defines whether index database using phrases ("phrase" parameter in indexer.conf).
Possible values: UDM_PHRASE_ENABLED and UDM_PHRASE_DISABLED.
Please note, that if phrase search is enabled (UDM_PHRASE_ENABLED),
it is still possible to do search in any mode (ANY, ALL, BOOL or PHRASE).
In 3.1.10 version of mnoGoSearch phrase search is supported only in sql and buuilt-in database modes,
while beginning with 3.1.11 phrases are supported in cachemode as well.
</simpara>
<simpara>
Examples of phrase search:
</simpara>
<simpara>
"Arizona desert" - This query returns all indexed documents that contain "Arizona desert" as a phrase. Notice that you need to put double quotes around the phrase
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_CHARSET - defines local charset. Available values: set of charsets supported by mnoGoSearch,
e.g. koi8-r, cp1251, ...
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_STOPFILE - Defines name and path
to stopwords file. (There is a small difference with mnoGoSearch
- while in mnoGoSearch if relative path or no path entered, it
looks for this file in relation to UDM_CONF_DIR, the module looks for
the file in relation to current path, i.e. to the path where the
php script is executed.)
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_STOPTABLE - Load stop words from the given SQL table. You may use several StopwordTable commands.
This command has no effect when compiled without SQL database support.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_WEIGHT_FACTOR - represents weight factors for specific document parts. Currently body, title, keywords, description, url are supported.
To activate this feature please use degrees of 2 in *Weight commands of
the indexer.conf. Let's imagine that we have these weights:
</simpara>
<simpara>URLWeight 1</simpara>
<simpara>BodyWeight 2</simpara>
<simpara>TitleWeight 4</simpara>
<simpara>KeywordWeight 8</simpara>
<simpara>DescWeight 16</simpara>
<simpara>
As far as indexer uses bit OR operation for word weights when some
word presents several time in the same document, it is possible at search
time to detect word appearance in different document parts. Word which
appears only in the body will have 00000010 argegate weight (in binary notation).
Word used in all document parts will have 00011111 aggregate weight.
</simpara>
<simpara>
This parameter's value is a string of hex digits ABCDE. Each digit is a factor for corresponding bit in word weight. For the given above weights
configuration:
</simpara>
<simpara>E is a factor for weight 1 (URL Weight bit)</simpara>
<simpara>D is a factor for weight 2 (BodyWeight bit)</simpara>
<simpara>C is a factor for weight 4 (TitleWeight bit)</simpara>
<simpara>B is a factor for weight 8 (KeywordWeight bit)</simpara>
<simpara>A is a factor for weight 16 (DescWeight bit)</simpara>
<simpara>
Examples:
</simpara>
<simpara>
UDM_PARAM_WEIGHT_FACTOR=00001 will search through URLs only.
</simpara>
<simpara>
UDM_PARAM_WEIGHT_FACTOR=00100 will search through Titles only.
</simpara>
<simpara>
UDM_PARAM_WEIGHT_FACTOR=11100 will search through Title,Keywords,Desctription but not through URL and Body.
</simpara>
<simpara>
UDM_PARAM_WEIGHT_FACTOR=F9421 will search through:
</simpara>
<simpara>Description with factor 15 (F hex)</simpara>
<simpara>Keywords with factor 9</simpara>
<simpara>Title with factor 4</simpara>
<simpara>Body with factor 2</simpara>
<simpara>URL with factor 1</simpara>
<simpara>
If UDM_PARAM_WEIGHT_FACTOR variable is ommited, original weight value is
taken to sort results. For a given above weight configuration it means
that document description has a most big weight 16.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_WORD_MATCH - word match. You may use this parameter to choose word match type. This feature works only
in "single" and "multi" modes using SQL based and built-in database. It does not work in cachemode and other modes
since they use word CRC and do not support substring search.
Available values:
</simpara>
<simpara>UDM_MATCH_BEGIN - word beginning match;</simpara>
<simpara>UDM_MATCH_END - word ending match;</simpara>
<simpara>UDM_MATCH_WORD - whole word match;</simpara>
<simpara>UDM_MATCH_SUBSTR - word substring match.</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_MIN_WORD_LEN - defines minimal word length.
Any word shorter this limit is considered to be a stopword. Please note that this paraneter value is inclusive,
i.e. if UDM_PARAM_MIN_WORD_LEN=3, a word 3 characters long will not be considered a stopword, while
a word 2 characters long will be. Default value is 1.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_ISPELL_PREFIXES - Possible values: UDM_PREFIXES_ENABLED and UDM_PREFIXES_DISABLED,
that respectively enable or disable using prefixes. E.g. if a word "tested" is in search query, also words like "test", "testing", etc.
Only suffixes are supported by default. Prefixes usually change word meanings, for example if somebody is searching for the word "tested"
one hardly wants "untested" to be found. Prefixes support may also be found useful for site's
spelling checking purposes. In order to enable ispell, you have to load ispell data with <function>udm_load_ispell_data</function>.
</simpara>
</listitem>
<listitem>
<simpara>
UDM_PARAM_CROSS_WORDS - enables or disables crosswords support.
Possible values: UDM_CROSS_WORDS_ENABLED and UDM_CROSS_WORDS_DISABLED.
</simpara>
<simpara>
The corsswords feature allows to assign words between &lt;a href="xxx"&gt; and &lt;/a&gt;
also to a document this link leads to. It works in SQL database mode and
is not supported in built-in database and Cachemode.
</simpara>
<note>
<simpara>
Crosswords are supported only in mnoGoSearch 3.1.11 or later.
</simpara>
</note>
</listitem>
</itemizedlist>
</refsect1>
</refentry>
<refentry id="function.udm-errno">
<refnamediv>
<refname>udm_errno</refname>
<refpurpose>Get mnoGoSearch error number</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>udm_errno</function></funcdef>
<paramdef>int <parameter>agent</parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_errno</function> returns mnoGoSearch error number,
zero if no error.
</para>
<para>
<parameter>agent</parameter> - link to agent identifier, received
after call to <function>udm_alloc_agent</function>.
</para>
<para>
Receiving numeric agent error code.
</para>
</refsect1>
</refentry>
<refentry id="function.udm-error">
<refnamediv>
<refname>udm_error</refname>
<refpurpose>Get mnoGoSearch error message</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcprototype>
<funcdef>string <function>udm_error</function></funcdef>
<paramdef>int <parameter>agent</parameter></paramdef>
</funcprototype>
</funcsynopsis>
<para>
<function>udm_error</function> returns mnoGoSearch error message,
empty string if no error.
</para>
<para>
<parameter>agent</parameter> - link to agent identifier, received
after call to <function>udm_alloc_agent</function>.
</para>
<para>
Receiving agent error message.
</para>
</refsect1>
</refentry>
</reference>
</reference>
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